WISE J0304−2705
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Fornax |
| Right ascension | 03h 04m 48.95s |
| Declination | −27° 05′ 13.35″ |
| Characteristics | |
| Evolutionary stage | brown dwarf |
| Spectral type | Y0pec[1] |
| Astrometry | |
| Proper motion (μ) | RA: 124.6 ±1.8 mas/yr[2] Dec.: 494.3 ±2.6 mas/yr[2] |
| Parallax (π) | 73.1±2.6 mas[2] |
| Distance | 45 ± 2 ly (13.7 ± 0.5 pc) |
| Details[1] | |
| Mass | 21−31 MJup |
| Surface gravity (log g) | 4.0−5.0 cgs |
| Temperature | 465 ±88[2] K |
| Age | 10 Gyr |
| Other designations | |
| CNS5 770, WISEA J030449.04-270508.1, WISE J030449.03-270508.3 | |
| Database references | |
| SIMBAD | data |
WISE J0304−2705 (WISE J030449.03−270508.3) is a Y-dwarf discovered in 2014.[1]
The object was first identified from data of the Wide-field Infrared Survey Explorer in 2014. Follow-up observation with Gemini South obtained a spectrum of the object. The spectral type was found to be Y0pec, with pec standing for peculiar. The object shows a Y-band and J-band morphology indicative of sub-solar metallicity. Alternatively the J-band morphology could be explained by high gravity. This might indicate an old age of about 10 Gyr and a mass of 21−31 MJ.[1] A later analysis pointed out that metallicity might not be the only cause for its unusual color.[3]
